I've felt like the battery life on smartphones has always been pretty terrible, though this could be due to buying my phones used for a cheaper price and not new. I compared my iPhone 4s to the 6 and 6+ side by side, and I can definitely say that the 6+ is what I want. I use a Swype-like third party keyboard to text one handed on my 4s, as horizontal orientation really seems to cramp my hands up after a conversation. Though, I suppose I would need to have owned one for a extended period of time to really say for sure. If it gets any bigger though, it's just going to end up straying into tablet territory.A lot of people think that the bigger the screen, the better the phone but that's not always the case. A mobile device as also got to be, well, mobile aswell, so just how big do people want their phones these days?